Quote the list of patch files in case they have spaces in their paths

[ericniebler]

Description

The rapids cpm scripts fail when populating a dependency with patches if the build directory contains spaces in its path name. The reason is because the paths are not properly quoted in the cmake patch script generated from command_template.cmake.in.

This PR properly quotes the list of patch file names.

Checklist

• I am familiar with the Contributing Guidelines.
• New or existing tests cover these changes.
• The documentation is up to date with these changes.
• The cmake-format.json is up to date with these changes.
• I have added new files under rapids-cmake/
  • I have added include guards (include_guard(GLOBAL))
  • I have added the associated docs/ rst file and update the api.rst

[bdice]

Thanks @ericniebler! Could you add a test for this case?

[robertmaynard]

The current patch override test case ( testing/cpm/cpm_generate_patch_command-current_json_dir.cmake ) should fail now since the set for the files variable has changed.

It should be sufficient to adjust the test to look for the new leading quote

[robertmaynard]

/merge